Yehaaaaw

L

langchop

Joined
Jun 16, 2007
Messages
301
What a whack of fun I had today... grinding away at my first knife(s)... All went pretty well I thought, except on one blank where i cut the bevel a bit too much and swarfed the cutting edge... something I will know to be aware of next time. Ok so I used a grinder which means steel got pretty damn hot. My question is this... When I get to the stage of heat hardening, do I need to do some treatment before I actually do the heat and quench? I assume there would need to be some 'normalising' or something similar first, and would this be a similar process to tempering? (ie heating to moderate temps)

Thanks

Lang:eek:
 
You better ask these questions in the "shop talk", "Makers" subforum. Many there are qualified to give you a pertinent answer.
AFAK normalizing is done by heating the blade like for quench (to non-magnetic) then letting it cool VERY VERY slowly. Tempering temperatures are way too low.
 
normalizing is heating above critical and air cooling, annealing uses much slower cooling rates. normalizing eliminates stresses, which could help avoid warping in the quench, annealing makes the steel easier to grind and drill.
 
moving-van.jpg
 
hard heart is correct. I would not hurt one bit to normalize (thermal cycle) the blade 2-3 times. In fact I would insist on it. Heat the blade to non-magnetic and let it cool in still air to room temp. Repeat X3 then do your normal heat treating..good luck and have fun..don't forget to post pictures of your work.:thumbup:
 
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